A study published in Military Medicine showed that after 30 days of practicing the Transcendental Meditation technique, 80 percent of the 46 veterans and active-duty personnel no longer had PTSD. All participants had been clinically diagnosed with PTSD using a standard assessment. By comparison, standard treatments for PTSD–prolonged exposure therapy, cognitive processing therapy, and medication–are only partially successful: approximately two-thirds of patients receiving cognitive processing therapy or prolonged exposure still have PTSD after treatment.